Suppliers

A supplier from which we can purchase items.

Field	Type	Description
name	non-empty string	Unique name of the supplier. This is the key field and a required attribute.
description	string	Free format description.
category	string	Free format category.
subcategory	string	Free format subcategory.
available	calendar	Calendar defining the holiday schedule of the supplier. Procurements will be stretched to account for the unavailable time.